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--- ffmpeg [2021/02/22 08:23] – sqbell
+++ ffmpeg [2021/05/03 21:31] (current) – sqbell
@@ Line 12: / Line 12: @@
   * https://rainnic.altervista.org/en/how-stabilize-video-using-ffmpeg-and-vidstab
+==== Obrót filmu o 180 stopni ====
+<code>
+ffmpeg -i input.mp4 -vf "hflip,vflip,format=yuv420p" -metadata:s:v rotate=0 \
+-codec:v libx264 -codec:a copy output.mkv
+</code>
+INFO:
+  * https://superuser.com/questions/578321/how-to-rotate-a-video-180-with-ffmpeg
+==== Przyspieszenie filmu ====
+<code>
+ffmpeg -i input.mkv -filter:v "setpts=PTS/60" output.mkv
+</code>
+PTS/60 = 60-krotne przyspiesznie.
+INFO:
+  * https://superuser.com/questions/1261678/how-do-i-speed-up-a-video-by-60x-in-ffmpeg
+==== Obrót, przyspieszenie, overlay ====
+<code>
+ffmpeg -hwaccel auto -i DSC_5796.MOV -i ~/Dokumenty/elisa_watermark.png -filter_complex "[0]hflip,vflip,format=yuv420p,setpts=PTS/4[a];[a][1]overlay=main_w-overlay_w-10:10" -metadata:s:v rotate=0 -codec:v libx264 -preset slow -crf 22 -filter:a "atempo=4.0" -movflags +faststart DSC_5796_rotated_and_fast_with_overlay.MOV
+</code>
+==== Obrót i overlay ====
+<code>
+ffmpeg -hwaccel auto -i DSC_5793.MOV -i ~/Dokumenty/elisa_watermark.png -filter_complex "[0]hflip,vflip,format=yuv420p[a];[a][1]overlay=main_w-overlay_w-10:10" -metadata:s:v rotate=0 -codec:v libx264 -preset slow -crf 22 -c:a copy -movflags +faststart DSC_5793_rotated_and_slow_with_overlay.MOV
+</code>